if you're getting Diesel get a Cummins. I have a 2006 5.9 Dually with G56, and a 2018 6.7 Dually with the Aisin.
I tried that 7.3 route for about a year, it wasn't me. wasn't even CLOSE to a Cummins. that 7.3 goes 0-60 in an eternity. engine is reliable, but it's a dog.
